I would like to know what`s this Extension for?
I know this function needs 6 arguments
glProgramEnvParameter4dARB(GL_FRAGMENT_PROGRAM_ARB , a, b,c,d,e );
But what does this function do? and what variables are a,b,c,d,e ?
I try to understand this method. textSize = Size of texture and squareletSize is the size of on cube side because this method is used to map a texture on a cube and then on an object. However maybe some knews glProgramEnvParameter4dARB()